Red Blocks

Here it come!
Brain Games - Fun Games That Train Your Mind

Finish dyeing all the masses in red, making full use of your IQ!

There are 4000 stages!
Can you clear all the stages?

【How to play】
A color can be changed by touching a mass and vertical and horizontal mass to "black -> red" and "red -> black."
you should look at a screen very carefully and leads to a correct answer.
when all the masses are made to red. It's clear.
It's so Cool.